1,876 research outputs found
Towards Collaborative Conceptual Exploration
In domains with high knowledge distribution a natural objective is to create
principle foundations for collaborative interactive learning environments. We
present a first mathematical characterization of a collaborative learning
group, a consortium, based on closure systems of attribute sets and the
well-known attribute exploration algorithm from formal concept analysis. To
this end, we introduce (weak) local experts for subdomains of a given knowledge
domain. These entities are able to refute and potentially accept a given
(implicational) query for some closure system that is a restriction of the
whole domain. On this we build up a consortial expert and show first insights
about the ability of such an expert to answer queries. Furthermore, we depict
techniques on how to cope with falsely accepted implications and on combining
counterexamples. Using notions from combinatorial design theory we further
expand those insights as far as providing first results on the decidability
problem if a given consortium is able to explore some target domain.
Applications in conceptual knowledge acquisition as well as in collaborative
interactive ontology learning are at hand.Comment: 15 pages, 2 figure
Knowledge discovery through creating formal contexts
Knowledge discovery is important for systems that have computational intelligence in helping them learn and adapt to changing environments. By representing, in a formal way, the context in which an intelligent system operates, it is possible to discover knowledge through an emerging data technology called formal concept analysis (FCA). This paper describes a tool called FcaBedrock that converts data into formal contexts for FCA. This paper describes how, through a process of guided automation, data preparation techniques such as attribute exclusion and value restriction allow data to be interpreted to meet the requirements of the analysis. Examples are given of how formal contexts can be created using FcaBedrock and then analysed for knowledge discovery, using real datasets. Creating formal contexts using FcaBedrock is shown to be straightforward and versatile. Large datasets are easily converted into a standard FCA format
Emergent Concepts on Knowledge Intensive Processes
An approach to refine and revise the general framework of KiP
(Knowledge Intensive Process) is presented. The specific case of collaborative
KiP is studied and the prominent role of collaborative KiPs in the general context
of Business Processes is revealed. The approach is based on Formal Concept
Analysis.Junta de Andalucía TIC-606
Agent-mediated shared conceptualizations in tagging services
Some of the most remarkable innovative technologies from the Web 2.0
are the collaborative tagging systems. They allow the use of folksonomies as a useful
structure for a number of tasks in the social web, such as navigation and knowledge
organization. One of the main deficiencies comes from the tagging behaviour of
different users which causes semantic heterogeneity in tagging. As a consequence
a user cannot benefit from the adequate tagging of others. In order to solve the
problem, an agent-based reconciliation knowledge system, based on Formal Concept
Analysis, is applied to facilitate the semantic interoperability between personomies.
This article describes experiments that focus on conceptual structures produced by
the system when it is applied to a collaborative tagging service, Delicious. Results
will show the prevalence of shared tags in the sharing of common resources in the
reconciliation process.Ministerio de Ciencia e Innovación TIN2009-09492Ministerio de Ciencia e Innovación TIN2010-20967-C04-0
Towards a Soft Evaluation and Refinement of Tagging in Digital Humanities
In this paper we estimate the soundness of tagging in digital repositories
within the field of Digital Humanities by studying the (semantic) conceptual structure
behind the folksnonomy. The use of association rules associated to this conceptual
structure (Stem and Luxenburger basis) allows to faithfully (from a semantic
point of view) complete the tagging (or suggest such a completion).Ministerio de Economía y Competitividad TIN2013-41086-PJunta de Andalucía TIC-606
Identification of Critical Factors in Large Crisis Decision Making Processes using Computational Tools: The case of ATHENA
Crises are a constant element of modern day life. Earthquakes, floods, terrorist acts are major examples of crises that occur in different areas under different frequencies. Crisis situations are always dynamic and they are characterised by unpredictable consequences that societies cannot always handle. The dynamics of crisis situations are such that societies have to re-evaluate and re-design their policies. This paper aims to present a Social Media-based system that coordinates the responses of the authorities in a large crisis. The paper performs extensive review of literature in order to identify decision making approaches in crisis situations and the different factors that affect these approaches. It also presents the ATHENA Crisis Management system which is based on a platform that makes combined use of data mining algorithms for the purpose of analysing large amounts of data received through the Social Media during and after a large crisis. A number of conclusions are drawn on the identification of different types of factors that impact large crisis decision making
Urban Knowledge Extraction, Representation and Reasoning as a Bridge from Data City towards Smart City
Urban Data management represents a major challenge
in the field of Smart Cities. Its understanding is essential for
the development of better smart services, which are a persistent
demand in urban policies. From all the sources of data available,
those that involve a collective processing of urban information
(by the citizens or other collectives) deliver in fact, useful insights
into social perception. Such is the case, for example, of data
collected from mobile networks. Prior to the design of sociotechnical
artifacts in cities, it seems important to extract the
qualitative and quantitative opinions, sentiment and feedbacks
present in these data. In this paper we present three solutions for
mining these contents through Knowledge Extraction methods,
as a previous step to the prospection of new smart services.Ministerio de Economía y Competitividad TIN2013-41086-
A Transaction-oriented architecture for enterprise systems
Many enterprises risk business transactions based on information systems that are incomplete or misleading, given that 80-85% of all corporate information remains outside of their processing scope. It highlights that the bulk of information is too unstructured for these systems to process, but must be taken into account if those systems are to provide effective support. Computer technology nonetheless continues to become more and more predominant, illustrated by SAP A.G. recognising that 65-70% of the world's transactions are run using their technology. Using SAP as an illustrative case study, and by bringing in the benefits of technologies such as Service-Oriented Architecture (SOA), Business Process Management (BPM), Enterprise Architecture Frameworks (EA) and Conceptual Structures, a practical roadmap is identified to a Transaction-Oriented Architecture (TOA) that is predicated on the Transaction Concept. This concept builds upon the Resources-Events-Agents (REA) modelling pattern that is close to business reality. Enterprise systems can thus better incorporate that missing 80-85% of hitherto too-unstructured information thereby allowing enterprise systems vendors such as SAP, their competitors, customers, suppliers and partners to do an ever better job with the world's transactions
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